立轴风力机临界转速的计算

THE CALCULATIONS OF CRITICAL SPEED FOR VERTICAL AXIS WINDMILL(VAW)

为避免风力机在临界转速下运转，必须求出其临界转速。本文介绍的求临界转速的“累试法”，其基本原理与普洛尔（Ｐｒｏｈｌ）法相同，但累试法考虑了变截面梁的影响，故其结果较普洛尔法更为接近真值。本文还提出了立轴风力机回转力矩计算的力学模型，并给出了立轴风力机临界转速计算的通用程序。

In order to avoid the VAW revolved at the critical speed,we must work out its criticalspeed.This paper is to introduce a method called Iteration Method that can be used to calcu-late the critical speed,whose foundamentals are identical to the Prohl Method.Since the fac-tors of the section-varying have been considered in Iteration Method,and its results will benearer to the real values than in Prohl.The mechanics model used to calculate the rotary mo-ment and the general programme for calculating the critical speed of VAW are also advancedin this paper.